iW3614

iW3614

AC/DC Digital Power Controller for

High Power Factor Dimmable LED Drivers

AC Input

From Dimmer

RTN

+

U1

iW3614

NTC

Thermistor

OUTPUT(TR)

VT

OUTPUT

GND

1

2

3

8

7

6

4

5

+

Chopping

Circuit

Isolated Flyback

Converter

+

Pin #

Name

Type

Pin Description

1

OUTPUT(TR)

Output

Gate drive for chopping MOSFET switch

2

V

SENSE

Analog Input Auxiliary voltage sense (used for primary side regulation and ZVS)

3

V

IN

Analog Input Rectified AC line voltage sense

4

V

T

Analog Input External power limit and shutdown control

5

GND

Ground

Ground

6

I

SENSE

Analog Input Primary current sense (used for cycle-by-cycle peak current control and limit)

7

OUTPUT

Output

Gate drive for main MOSFET switch

8

V

CC

Power Input Power supply for control logic and voltage sense for power-on reset circuitry

iW3614

1

2

3

8

7

6

4

5

GND

OUTPUT(TR)

OUTPUT

Figure 3.1 : Typical Application Circuit

4.0 Pinout Description